add v1.1.0 changelog

Author: tillkruss

CHANGELOG.md

@@ -5,9 +5,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
-### Changed
-- Added support for [Swoole](https://github.com/swoole/swoole-src)
+## [1.1.0] - 2021-03-26
+- Added [Swoole](https://github.com/swoole/swoole-src) v4.6.4
 - Overhauled demo app
 - Only build on push to `main` branch
 - Make repos after successful build workflow